package com.sky.aspect;

import com.sky.annotation.AutoFill;
import com.sky.constant.AutoFillConstant;
import com.sky.context.BaseContext;
import com.sky.enumeration.OperationType;
import lombok.extern.slf4j.Slf4j;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.Signature;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.aspectj.lang.reflect.MethodSignature;
import org.springframework.stereotype.Component;

import java.lang.reflect.Method;
import java.time.LocalDateTime;

@Component
@Slf4j
@Aspect
public class AutoFillAspect {
    @Pointcut("execution(* com.sky.mapper.*.*(..)) && @annotation(com.sky.annotation.AutoFill)")
    public void pt(){}

    @Before("pt()")
    public void AutoFill(JoinPoint joinPoint){
         //1.获取类型 是更新还是插入
        MethodSignature signature = (MethodSignature) joinPoint.getSignature();
//        System.out.println(signature);void com.sky.mapper.EmployeeMapper.update(Employee)
        AutoFill annotation = signature.getMethod().getAnnotation(AutoFill.class);
//        System.out.println(annotation);@com.sky.annotation.AutoFill(UPDATE)
        OperationType operationType = annotation.value();
//        System.out.println(operationType);UPDATE
        //2.获取参数，赋值
        Object[] args = joinPoint.getArgs();
//        args 返回的是方法的参数数组
        if(args ==null || args.length==0) {
            return;
        }
        Object entity = args[0]; //获得对象
        if(operationType == OperationType.INSERT){
            try {
                Method setCreateTime  = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_TIME, LocalDateTime.class);
                Method setCreateUser = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_USER, Long.class);
                Method setUpdateTime = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_TIME, LocalDateTime.class);
                Method setUpdateUser = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_USER, Long.class);
                //赋值
                setCreateTime.invoke(entity,LocalDateTime.now());
                setCreateUser.invoke(entity, BaseContext.getCurrentId());
                setUpdateTime.invoke(entity,LocalDateTime.now());
                setUpdateUser.invoke(entity,BaseContext.getCurrentId());

            } catch (Exception e) {
                throw new RuntimeException(e);
            }

        }else if(operationType == OperationType.UPDATE){
            try {
                Method setUpdateTime = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_TIME, LocalDateTime.class);
                Method setUpdateUser = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_USER, Long.class);
                //赋值
                setUpdateTime.invoke(entity,LocalDateTime.now());
                setUpdateUser.invoke(entity,BaseContext.getCurrentId());
            } catch (Exception e) {
                throw new RuntimeException(e);
            }
        }
    }


    
}
